Ctjbtaiw-fixture



UNITED STATES PAENT THOS. C. BALDWIN, OF NEWTON, MAASSCHISETTS.

CURTAIN-FIXTURE.

Specification of Letters Patent No. 22,153, dated November 30, 1858.

To all whom t may concern.

Be it known that LT1-10ans C. BALDwiN, of Newton, in the county ofMiddlesex and State of Massachusetts, have invented an Improved Curtainor Window-Shade Fixture; and I do hereby declare that the same is fullydescribed and represented in the following specification and theaccompanying drawings, of which Figure 1, denotes a front View orelevation of a window frame and curtain or shade having my inventionapplied to them. F ig. 2, is a longitudinal and vertical section of thesame, it being taken through the axis of the curtain roller. Fig. 3, isa trans verse section taken through the rotary ratchet of the curtainroller. Fig. 4, is a side view of the curtain roller; while, Figs. 5,and 6, are inner side views of its bearing blocks.

In the drawings, A, denotes the window frame; B, the curtain roller; C,the curtain or shade; while D, is the winding pulleys thereof, suchpulley having a cord and tassel depending from it as shown at E, anothercord and tassel being suspended from the middle of the lower part of thecurtain as shown at F. Gr, and H, are the two bearing blocks of thecurtain roller, one of them viz, G, or that opposite to the one againstwhich the pulley D, runs is formed with a bearing recess or supportingbearing, a, for the reception of the cylindrical end of the curtainroller. Directly over the recess, a, is what I term the detaching recessor chamber, Z9, which opens into the bearing a, and is made of a greaterdepth than such bearing a, as shown in the drawings. Furthermore, thepulley D, has a journal I, extending from it and formed with acylindrical neck, c, for the reception of a rotary ratchet (Z, a helicalspring c, and a leather washer, f, the same being arranged on the neckas shown in Figs. 2, and 4. The said spring e, encompasses the saidneck, and forces the rotary ratchet closely against the washer so as tocompress the latter between the ratchet and the larger part of thejournal and for the purpose of causing the ratchet while being turned onthe journal, or the latter is turned on the former, t-o rotate withconsiderable friction on the ournal, or in other words, an amount offriction su'Hicient to uphold the curtain and prevent its weight fromunwinding it when the curtain is either partially or wholly raised itbeing understood that while the curtain is raised either wholly orpartially, the ratchet is held stationary by a click or pawl, K,arranged in the bearing block A, as shown in the drawings. rthis latterbearing block is formed with a round bearing, g, for the recept-ion ofthe larger part of the journal, I, it also is made with a chamber, h,for receiving the ratchet, such chamber having a passage, z', leadingdownward out of it, and of a width a little greater than the diameter ofthe larger part of the said journal I. Furthermore, the said bearingblock H, is construct ed with a chamber, K, for the reception of thepawl K, such pawl being so arranged that when. the cord and tassel F,are drawn downward, it, (the pawl) shall give away and allow the ratchetand curtain roller to freely revolve together, the pawl holding theratchet or preventing it from being re- .volved when the curtain isdepending from the roller or while such curtain is being drawn downward.

By means of the detaching chamber, Z), and passage, 2', in the bearingblocks G, and H, the curtain roller may be easily detached from the saidblocks or applied in its bearings therein, as circumstances may require.In consequence of the arrangement of the rotary ratchet and its springon the journal, I, extending directly from the pulley, D, or thatjournal which is next to the pulley, an important advantage results inthe matter of preparing the curtain rollers for the market, as well asfitting a roller to its bearing blocks; for when the ratchet and pulleyare on one or the same end of the roller instead of being arrangedrespectively at its two ends, the roller may be made somewhat longerthan may be necessary for any window frame, and after the bearing blockshave been fixed in place in a window frame, we have only to measure thedistance between the inner face of the block H, and the vertical surfaceZ, of the bearing, a.. This distance measured on the roller and from theouter surface of the outer head of the pulley D, determines the placewhere the curtain roller is to be cut ofll in order to be of the rightlength to work in the bearing blocks.

I claiml. The detaching chamber, b, and passage z', in their combinationand arrangement with the journal bearings of the two bearing blocks G,I-I, and with the rotary friction ratchet, its spring and the pulleyarranged pulley in manner and for the purpose and to 10 at one end ofthe curtain roller, substanobtain the advantage as described.

tially as described and for the purpose spec- In testimony whereof Ihave hereunto set fied. f my signature.

2. I also claim the arranfrernent o the rotary friction ratchet, itssdring, and the THOMAS C BALDXVIN' pulley, at one and the saine end ofthe cur- Wrtnesses: tain roller or so that the said ratchet may It. I-I.EDDY, turn on the journal projecting from the said F. P. HALE, J r.

